ref: 83246e296ea433b65b9d295b5e08fedd39ff1ab7
dir: /os/pc/usbuhci.c/
#include "u.h"
#include "../port/lib.h"
#include "mem.h"
#include "dat.h"
#include "fns.h"
#include "io.h"
#include "../port/error.h"
#include "usb.h"
#define XPRINT if(debug)print
static int Chatty = 0;
static int debug = 0;
static char Estalled[] = "usb endpoint stalled";
/*
* UHCI interface registers and bits
*/
enum
{
/* i/o space */
Cmd = 0,
Status = 2,
Usbintr = 4,
Frnum = 6,
Flbaseadd = 8,
SOFMod = 0xC,
Portsc0 = 0x10,
Portsc1 = 0x12,
/* port status */
Suspend = 1<<12,
PortReset = 1<<9,
SlowDevice = 1<<8,
ResumeDetect = 1<<6,
PortChange = 1<<3, /* write 1 to clear */
PortEnable = 1<<2,
StatusChange = 1<<1, /* write 1 to clear */
DevicePresent = 1<<0,
NFRAME = 1024,
FRAMESIZE= NFRAME*sizeof(ulong), /* fixed by hardware; aligned to same */
Vf = 1<<2, /* TD only */
IsQH = 1<<1,
Terminate = 1<<0,
/* TD.status */
SPD = 1<<29,
ErrLimit0 = 0<<27,
ErrLimit1 = 1<<27,
ErrLimit2 = 2<<27,
ErrLimit3 = 3<<27,
LowSpeed = 1<<26,
IsoSelect = 1<<25,
IOC = 1<<24,
Active = 1<<23,
Stalled = 1<<22,
DataBufferErr = 1<<21,
Babbling = 1<<20,
NAKed = 1<<19,
CRCorTimeout = 1<<18,
BitstuffErr = 1<<17,
AnyError = (Stalled | DataBufferErr | Babbling | NAKed | CRCorTimeout | BitstuffErr),
/* TD.dev */
IsDATA1 = 1<<19,
/* TD.flags (software) */
CancelTD= 1<<0,
IsoClean= 1<<2,
};
static struct
{
int bit;
char *name;
}
portstatus[] =
{
{ Suspend, "suspend", },
{ PortReset, "reset", },
{ SlowDevice, "lowspeed", },
{ ResumeDetect, "resume", },
{ PortChange, "portchange", },
{ PortEnable, "enable", },
{ StatusChange, "statuschange", },
{ DevicePresent, "present", },
};
typedef struct Ctlr Ctlr;
typedef struct Endptx Endptx;
typedef struct QH QH;
typedef struct TD TD;
/*
* software structures
*/
struct Ctlr
{
Lock; /* protects state shared with interrupt (eg, free list) */
Ctlr* next;
Pcidev* pcidev;
int active;
int io;
ulong* frames; /* frame list */
ulong* frameld; /* real time load on each of the frame list entries */
QLock resetl; /* lock controller during USB reset */
TD* tdpool;
TD* freetd;
QH* qhpool;
QH* freeqh;
QH* ctlq; /* queue for control i/o */
QH* bwsop; /* empty bandwidth sop (to PIIX4 errata specifications) */
QH* bulkq; /* queue for bulk i/o (points back to bandwidth sop) */
QH* recvq; /* receive queues for bulk i/o */
Udev* ports[2];
struct {
Lock;
Endpt* f;
} activends;
long usbints; /* debugging */
long framenumber;
long frameptr;
long usbbogus;
};
#define IN(x) ins(ctlr->io+(x))
#define OUT(x, v) outs(ctlr->io+(x), (v))
static Ctlr* ctlrhead;
static Ctlr* ctlrtail;
struct Endptx
{
QH* epq; /* queue of TDs for this endpoint */
/* ISO related: */
void* tdalloc;
void* bpalloc;
uchar* bp0; /* first block in array */
TD * td0; /* first td in array */
TD * etd; /* pointer into circular list of TDs for isochronous ept */
TD * xtd; /* next td to be cleaned */
};
/*
* UHCI hardware structures, aligned on 16-byte boundary
*/
struct TD
{
ulong link;
ulong status; /* controller r/w */
ulong dev;
ulong buffer;
/* software */
ulong flags;
union{
Block* bp; /* non-iso */
ulong offset; /* iso */
};
Endpt* ep;
TD* next;
};
#define TFOL(p) ((TD*)KADDR((ulong)(p) & ~(0xF|PCIWINDOW)))
struct QH
{
ulong head;
ulong entries; /* address of next TD or QH to process (updated by controller) */
/* software */
QH* hlink;
TD* first;
QH* next; /* free list */
TD* last;
ulong _d1; /* fillers */
ulong _d2;
};
#define QFOL(p) ((QH*)KADDR((ulong)(p) & ~(0xF|PCIWINDOW)))
static TD *
alloctd(Ctlr *ctlr)
{
TD *t;
ilock(ctlr);
t = ctlr->freetd;
if(t == nil)
panic("alloctd"); /* TO DO */
ctlr->freetd = t->next;
t->next = nil;
iunlock(ctlr);
t->ep = nil;
t->bp = nil;
t->status = 0;
t->link = Terminate;
t->buffer = 0;
t->flags = 0;
return t;
}
static void
freetd(Ctlr *ctlr, TD *t)
{
t->ep = nil;
if(t->bp)
freeb(t->bp);
t->bp = nil;
ilock(ctlr);
t->buffer = 0xdeadbeef;
t->next = ctlr->freetd;
ctlr->freetd = t;
iunlock(ctlr);
}
static void
dumpdata(Block *b, int n)
{
int i;
XPRINT("\tb %8.8lux[%d]: ", (ulong)b->rp, n);
if(n > 16)
n = 16;
for(i=0; i<n; i++)
XPRINT(" %2.2ux", b->rp[i]);
XPRINT("\n");
}
static void
dumptd(TD *t, int follow)
{
int i, n;
char buf[20], *s;
TD *t0;
t0 = t;
while(t){
i = t->dev & 0xFF;
if(i == TokOUT || i == TokSETUP)
n = ((t->dev>>21) + 1) & 0x7FF;
else if((t->status & Active) == 0)
n = (t->status + 1) & 0x7FF;
else
n = 0;
s = buf;
if(t->status & Active)
*s++ = 'A';
if(t->status & Stalled)
*s++ = 'S';
if(t->status & DataBufferErr)
*s++ = 'D';
if(t->status & Babbling)
*s++ = 'B';
if(t->status & NAKed)
*s++ = 'N';
if(t->status & CRCorTimeout)
*s++ = 'T';
if(t->status & BitstuffErr)
*s++ = 'b';
if(t->status & LowSpeed)
*s++ = 'L';
*s = 0;
XPRINT("td %8.8lux: ", t);
XPRINT("l=%8.8lux s=%8.8lux d=%8.8lux b=%8.8lux %8.8lux f=%8.8lux\n",
t->link, t->status, t->dev, t->buffer, t->bp?(ulong)t->bp->rp:0, t->flags);
XPRINT("\ts=%s,ep=%ld,d=%ld,D=%ld\n",
buf, (t->dev>>15)&0xF, (t->dev>>8)&0xFF, (t->dev>>19)&1);
if(debug && t->bp && (t->flags & CancelTD) == 0)
dumpdata(t->bp, n);
if(!follow || t->link & Terminate || t->link & IsQH)
break;
t = TFOL(t->link);
if(t == t0)
break; /* looped */
}
}
static TD *
alloctde(Ctlr *ctlr, Endpt *e, int pid, int n)
{
TD *t;
int tog, id;
t = alloctd(ctlr);
id = (e->x<<7)|(e->dev->x&0x7F);
tog = 0;
if(e->data01 && pid != TokSETUP)
tog = IsDATA1;
t->ep = e;
t->status = ErrLimit3 | Active | IOC; /* or put IOC only on last? */
if(e->dev->ls)
t->status |= LowSpeed;
t->dev = ((n-1)<<21) | ((id&0x7FF)<<8) | pid | tog;
return t;
}
static QH *
allocqh(Ctlr *ctlr)
{
QH *qh;
ilock(ctlr);
qh = ctlr->freeqh;
if(qh == nil)
panic("allocqh"); /* TO DO */
ctlr->freeqh = qh->next;
qh->next = nil;
iunlock(ctlr);
qh->head = Terminate;
qh->entries = Terminate;
qh->hlink = nil;
qh->first = nil;
qh->last = nil;
return qh;
}
static void
freeqh(Ctlr *ctlr, QH *qh)
{
ilock(ctlr);
qh->next = ctlr->freeqh;
ctlr->freeqh = qh;
iunlock(ctlr);
}
static void
dumpqh(QH *q)
{
int i;
QH *q0;
q0 = q;
for(i = 0; q != nil && i < 10; i++){
XPRINT("qh %8.8lux: %8.8lux %8.8lux\n", q, q->head, q->entries);
if((q->entries & Terminate) == 0)
dumptd(TFOL(q->entries), 1);
if(q->head & Terminate)
break;
if((q->head & IsQH) == 0){
XPRINT("head:");
dumptd(TFOL(q->head), 1);
break;
}
q = QFOL(q->head);
if(q == q0)
break; /* looped */
}
}
static void
queuetd(Ctlr *ctlr, QH *q, TD *t, int vf, char *why)
{
TD *lt;
for(lt = t; lt->next != nil; lt = lt->next)
lt->link = PCIWADDR(lt->next) | vf;
lt->link = Terminate;
ilock(ctlr);
XPRINT("queuetd %s: t=%p lt=%p q=%p first=%p last=%p entries=%.8lux\n",
why, t, lt, q, q->first, q->last, q->entries);
if(q->first != nil){
q->last->link = PCIWADDR(t) | vf;
q->last->next = t;
}else{
q->first = t;
q->entries = PCIWADDR(t);
}
q->last = lt;
XPRINT(" t=%p q=%p first=%p last=%p entries=%.8lux\n",
t, q, q->first, q->last, q->entries);
dumpqh(q);
iunlock(ctlr);
}
static void
cleantd(Ctlr *ctlr, TD *t, int discard)
{
Block *b;
int n, err;
XPRINT("cleanTD: %8.8lux %8.8lux %8.8lux %8.8lux\n", t->link, t->status, t->dev, t->buffer);
if(t->ep != nil && t->ep->debug)
dumptd(t, 0);
if(t->status & Active)
panic("cleantd Active");
err = t->status & (AnyError&~NAKed);
/* TO DO: on t->status&AnyError, q->entries will not have advanced */
if (err) {
XPRINT("cleanTD: Error %8.8lux %8.8lux %8.8lux %8.8lux\n", t->link, t->status, t->dev, t->buffer);
// print("cleanTD: Error %8.8lux %8.8lux %8.8lux %8.8lux\n", t->link, t->status, t->dev, t->buffer);
}
switch(t->dev&0xFF){
case TokIN:
if(discard || (t->flags & CancelTD) || t->ep == nil || t->ep->x!=0&&err){
if(t->ep != nil){
if(err != 0)
t->ep->err = err==Stalled? Estalled: Eio;
wakeup(&t->ep->rr); /* in case anyone cares */
}
break;
}
b = t->bp;
n = (t->status + 1) & 0x7FF;
if(n > b->lim - b->wp)
n = 0;
b->wp += n;
if(Chatty)
dumpdata(b, n);
t->bp = nil;
t->ep->nbytes += n;
t->ep->nblocks++;
qpass(t->ep->rq, b); /* TO DO: flow control */
wakeup(&t->ep->rr); /* TO DO */
break;
case TokSETUP:
XPRINT("cleanTD: TokSETUP %lux\n", &t->ep);
/* don't really need to wakeup: subsequent IN or OUT gives status */
if(t->ep != nil) {
wakeup(&t->ep->wr); /* TO DO */
XPRINT("cleanTD: wakeup %lux\n", &t->ep->wr);
}
break;
case TokOUT:
/* TO DO: mark it done somewhere */
XPRINT("cleanTD: TokOut %lux\n", &t->ep);
if(t->ep != nil){
if(t->bp){
n = BLEN(t->bp);
t->ep->nbytes += n;
t->ep->nblocks++;
}
if(t->ep->x!=0 && err != 0)
t->ep->err = err==Stalled? Estalled: Eio;
if(--t->ep->ntd < 0)
panic("cleantd ntd");
wakeup(&t->ep->wr); /* TO DO */
XPRINT("cleanTD: wakeup %lux\n", &t->ep->wr);
}
break;
}
freetd(ctlr, t);
}
static void
cleanq(Ctlr *ctlr, QH *q, int discard, int vf)
{
TD *t, *tp;
ilock(ctlr);
tp = nil;
for(t = q->first; t != nil;){
XPRINT("cleanq: %8.8lux %8.8lux %8.8lux %8.8lux %8.8lux %8.8lux\n", t->link, t->status, t->dev, t->buffer, t->flags, t->next);
if(t->status & Active){
if(t->status & NAKed){
t->status = (t->status & ~NAKed) | IOC; /* ensure interrupt next frame */
tp = t;
t = t->next;
continue;
}
if(t->flags & CancelTD){
XPRINT("cancelTD: %8.8lux\n", (ulong)t);
t->status = (t->status & ~Active) | IOC; /* ensure interrupt next frame */
tp = t;
t = t->next;
continue;
}
tp = t;
t = t->next;
continue;
}
t->status &= ~IOC;
if (tp == nil) {
q->first = t->next;
if(q->first != nil)
q->entries = PCIWADDR(q->first);
else
q->entries = Terminate;
} else {
tp->next = t->next;
if (t->next != nil)
tp->link = PCIWADDR(t->next) | vf;
else
tp->link = Terminate;
}
if (q->last == t)
q->last = tp;
iunlock(ctlr);
cleantd(ctlr, t, discard);
ilock(ctlr);
if (tp)
t = tp->next;
else
t = q->first;
XPRINT("t = %8.8lux\n", t);
dumpqh(q);
}
if(q->first && q->entries != PCIWADDR(q->first)){
ctlr->usbbogus++;
q->entries = PCIWADDR(q->first);
}
iunlock(ctlr);
}
static void
canceltds(Ctlr *ctlr, QH *q, Endpt *e)
{
TD *t;
if(q != nil){
ilock(ctlr);
for(t = q->first; t != nil; t = t->next)
if(t->ep == e)
t->flags |= CancelTD;
iunlock(ctlr);
XPRINT("cancel:\n");
dumpqh(q);
}
}
static void
eptcancel(Ctlr *ctlr, Endpt *e)
{
Endptx *x;
if(e == nil)
return;
x = e->private;
canceltds(ctlr, x->epq, e);
canceltds(ctlr, ctlr->ctlq, e);
canceltds(ctlr, ctlr->bulkq, e);
}
static void
eptactivate(Ctlr *ctlr, Endpt *e)
{
ilock(&ctlr->activends);
if(e->active == 0){
XPRINT("activate 0x%p\n", e);
e->active = 1;
e->activef = ctlr->activends.f;
ctlr->activends.f = e;
}
iunlock(&ctlr->activends);
}
static void
eptdeactivate(Ctlr *ctlr, Endpt *e)
{
Endpt **l;
/* could be O(1) but not worth it yet */
ilock(&ctlr->activends);
if(e->active){
e->active = 0;
XPRINT("deactivate 0x%p\n", e);
for(l = &ctlr->activends.f; *l != e; l = &(*l)->activef)
if(*l == nil){
iunlock(&ctlr->activends);
panic("usb eptdeactivate");
}
*l = e->activef;
}
iunlock(&ctlr->activends);
}
static void
queueqh(Ctlr *ctlr, QH *qh)
{
QH *q;
// See if it's already queued
for (q = ctlr->recvq->next; q; q = q->hlink)
if (q == qh)
return;
if ((qh->hlink = ctlr->recvq->next) == nil)
qh->head = Terminate;
else
qh->head = PCIWADDR(ctlr->recvq->next) | IsQH;
ctlr->recvq->next = qh;
ctlr->recvq->entries = PCIWADDR(qh) | IsQH;
}
static QH*
qxmit(Ctlr *ctlr, Endpt *e, Block *b, int pid)
{
TD *t;
int n, vf;
QH *qh;
Endptx *x;
x = e->private;
if(b != nil){
n = BLEN(b);
t = alloctde(ctlr, e, pid, n);
t->bp = b;
t->buffer = PCIWADDR(b->rp);
}else
t = alloctde(ctlr, e, pid, 0);
ilock(ctlr);
e->ntd++;
iunlock(ctlr);
if(e->debug) pprint("QTD: %8.8lux n=%ld\n", t, b?BLEN(b): 0);
vf = 0;
if(e->x == 0){
qh = ctlr->ctlq;
vf = 0;
}else if((qh = x->epq) == nil || e->mode != OWRITE){
qh = ctlr->bulkq;
vf = Vf;
}
queuetd(ctlr, qh, t, vf, "qxmit");
return qh;
}
static QH*
qrcv(Ctlr *ctlr, Endpt *e)
{
TD *t;
Block *b;
QH *qh;
int vf;
Endptx *x;
x = e->private;
t = alloctde(ctlr, e, TokIN, e->maxpkt);
b = allocb(e->maxpkt);
t->bp = b;
t->buffer = PCIWADDR(b->wp);
vf = 0;
if(e->x == 0){
qh = ctlr->ctlq;
}else if((qh = x->epq) == nil || e->mode != OREAD){
qh = ctlr->bulkq;
vf = Vf;
}
queuetd(ctlr, qh, t, vf, "qrcv");
return qh;
}
static int
usbsched(Ctlr *ctlr, int pollms, ulong load)
{
int i, d, q;
ulong best, worst;
best = 1000000;
q = -1;
for (d = 0; d < pollms; d++){
worst = 0;
for (i = d; i < NFRAME; i++){
if (ctlr->frameld[i] + load > worst)
worst = ctlr->frameld[i] + load;
}
if (worst < best){
best = worst;
q = d;
}
}
return q;
}
static int
schedendpt(Ctlr *ctlr, Endpt *e)
{
TD *td;
Endptx *x;
uchar *bp;
int i, id, ix, size, frnum;
if(!e->iso || e->sched >= 0)
return 0;
if (e->active){
return -1;
}
e->off = 0;
e->sched = usbsched(ctlr, e->pollms, e->maxpkt);
if(e->sched < 0)
return -1;
x = e->private;
if (x->tdalloc || x->bpalloc)
panic("usb: tdalloc/bpalloc");
x->tdalloc = mallocz(0x10 + NFRAME*sizeof(TD), 1);
x->bpalloc = mallocz(0x10 + e->maxpkt*NFRAME/e->pollms, 1);
x->td0 = (TD*)(((ulong)x->tdalloc + 0xf) & ~0xf);
x->bp0 = (uchar *)(((ulong)x->bpalloc + 0xf) & ~0xf);
frnum = (IN(Frnum) + 1) & 0x3ff;
frnum = (frnum & ~(e->pollms - 1)) + e->sched;
x->xtd = &x->td0[(frnum+8)&0x3ff]; /* Next td to finish */
x->etd = nil;
e->remain = 0;
e->nbytes = 0;
td = x->td0;
for(i = e->sched; i < NFRAME; i += e->pollms){
bp = x->bp0 + e->maxpkt*i/e->pollms;
td->buffer = PCIWADDR(bp);
td->ep = e;
td->next = &td[1];
ctlr->frameld[i] += e->maxpkt;
td++;
}
td[-1].next = x->td0;
for(i = e->sched; i < NFRAME; i += e->pollms){
ix = (frnum+i) & 0x3ff;
td = &x->td0[ix];
id = (e->x<<7)|(e->dev->x&0x7F);
if (e->mode == OREAD)
/* enable receive on this entry */
td->dev = ((e->maxpkt-1)<<21) | ((id&0x7FF)<<8) | TokIN;
else{
size = (e->hz + e->remain)*e->pollms/1000;
e->remain = (e->hz + e->remain)*e->pollms%1000;
size *= e->samplesz;
td->dev = ((size-1)<<21) | ((id&0x7FF)<<8) | TokOUT;
}
td->status = ErrLimit1 | Active | IsoSelect | IOC;
td->link = ctlr->frames[ix];
td->flags |= IsoClean;
ctlr->frames[ix] = PCIWADDR(td);
}
return 0;
}
static void
unschedendpt(Ctlr *ctlr, Endpt *e)
{
int q;
TD *td;
Endptx *x;
ulong *addr;
if(!e->iso || e->sched < 0)
return;
x = e->private;
if (x->tdalloc == nil)
panic("tdalloc");
for (q = e->sched; q < NFRAME; q += e->pollms){
td = x->td0++;
addr = &ctlr->frames[q];
while(*addr != PADDR(td)) {
if(*addr & IsQH)
panic("usb: TD expected");
addr = &TFOL(*addr)->link;
}
*addr = td->link;
ctlr->frameld[q] -= e->maxpkt;
}
free(x->tdalloc);
free(x->bpalloc);
x->tdalloc = nil;
x->bpalloc = nil;
x->etd = nil;
x->td0 = nil;
e->sched = -1;
}
static void
epalloc(Usbhost *uh, Endpt *e)
{
Endptx *x;
x = malloc(sizeof(Endptx));
e->private = x;
x->epq = allocqh(uh->ctlr);
if(x->epq == nil)
panic("devendptx");
}
static void
epfree(Usbhost *uh, Endpt *e)
{
Ctlr *ctlr;
Endptx *x;
ctlr = uh->ctlr;
x = e->private;
if(x->epq != nil)
freeqh(ctlr, x->epq);
}
static void
epopen(Usbhost *uh, Endpt *e)
{
Ctlr *ctlr;
ctlr = uh->ctlr;
if(e->iso && e->active)
error("already open");
if(schedendpt(ctlr, e) < 0){
if(e->active)
error("cannot schedule USB endpoint, active");
else
error("cannot schedule USB endpoint");
}
eptactivate(ctlr, e);
}
static void
epclose(Usbhost *uh, Endpt *e)
{
Ctlr *ctlr;
ctlr = uh->ctlr;
eptdeactivate(ctlr, e);
unschedendpt(ctlr, e);
}
static void
epmode(Usbhost *uh, Endpt *e)
{
Ctlr *ctlr;
Endptx *x;
ctlr = uh->ctlr;
x = e->private;
if(e->iso) {
if(x->epq != nil) {
freeqh(ctlr, x->epq);
x->epq = nil;
}
}
else {
/* Each bulk device gets a queue head hanging off the
* bulk queue head
*/
if(x->epq == nil) {
x->epq = allocqh(ctlr);
if(x->epq == nil)
panic("epbulk: allocqh");
}
queueqh(ctlr, x->epq);
}
}
static int ioport[] = {-1, Portsc0, Portsc1};
static void
portreset(Usbhost *uh, int port)
{
int i, p;
Ctlr *ctlr;
ctlr = uh->ctlr;
if(port != 1 && port != 2)
error(Ebadarg);
/* should check that device not being configured on other port? */
p = ioport[port];
qlock(&ctlr->resetl);
if(waserror()){
qunlock(&ctlr->resetl);
nexterror();
}
XPRINT("r: %x\n", IN(p));
ilock(ctlr);
OUT(p, PortReset);
delay(12); /* BUG */
XPRINT("r2: %x\n", IN(p));
OUT(p, IN(p) & ~PortReset);
XPRINT("r3: %x\n", IN(p));
OUT(p, IN(p) | PortEnable);
microdelay(64);
for(i=0; i<1000 && (IN(p) & PortEnable) == 0; i++)
;
XPRINT("r': %x %d\n", IN(p), i);
OUT(p, (IN(p) & ~PortReset)|PortEnable);
iunlock(ctlr);
poperror();
qunlock(&ctlr->resetl);
}
static void
portenable(Usbhost *uh, int port, int on)
{
int w, p;
Ctlr *ctlr;
ctlr = uh->ctlr;
if(port != 1 && port != 2)
error(Ebadarg);
/* should check that device not being configured on other port? */
p = ioport[port];
qlock(&ctlr->resetl);
if(waserror()){
qunlock(&ctlr->resetl);
nexterror();
}
ilock(ctlr);
w = IN(p);
if(on)
w |= PortEnable;
else
w &= ~PortEnable;
OUT(p, w);
microdelay(64);
iunlock(ctlr);
XPRINT("e: %x\n", IN(p));
poperror();
qunlock(&ctlr->resetl);
}
static void
portinfo(Usbhost *uh, char *s, char *se)
{
int x, i, j;
Ctlr *ctlr;
ctlr = uh->ctlr;
for(i = 1; i <= 2; i++) {
ilock(ctlr);
x = IN(ioport[i]);
if((x & (PortChange|StatusChange)) != 0)
OUT(ioport[i], x);
iunlock(ctlr);
s = seprint(s, se, "%d %ux", i, x);
for(j = 0; j < nelem(portstatus); j++) {
if((x & portstatus[j].bit) != 0)
s = seprint(s, se, " %s", portstatus[j].name);
}
s = seprint(s, se, "\n");
}
}
static void
cleaniso(Endpt *e, int frnum)
{
TD *td;
int id, n, i;
Endptx *x;
uchar *bp;
x = e->private;
td = x->xtd;
if (td->status & Active)
return;
id = (e->x<<7)|(e->dev->x&0x7F);
do {
if (td->status & AnyError)
XPRINT("usbisoerror 0x%lux\n", td->status);
n = (td->status + 1) & 0x3ff;
e->nbytes += n;
if ((td->flags & IsoClean) == 0)
e->nblocks++;
if (e->mode == OREAD){
e->buffered += n;
e->poffset += (td->status + 1) & 0x3ff;
td->offset = e->poffset;
td->dev = ((e->maxpkt -1)<<21) | ((id&0x7FF)<<8) | TokIN;
e->toffset = td->offset;
}else{
if ((td->flags & IsoClean) == 0){
e->buffered -= n;
if (e->buffered < 0){
// print("e->buffered %d?\n", e->buffered);
e->buffered = 0;
}
}
e->toffset = td->offset;
n = (e->hz + e->remain)*e->pollms/1000;
e->remain = (e->hz + e->remain)*e->pollms%1000;
n *= e->samplesz;
td->dev = ((n -1)<<21) | ((id&0x7FF)<<8) | TokOUT;
td->offset = e->poffset;
e->poffset += n;
}
td = td->next;
if (x->xtd == td){
XPRINT("@");
break;
}
} while ((td->status & Active) == 0);
e->time = todget(nil);
x->xtd = td;
for (n = 2; n < 4; n++){
i = ((frnum + n)&0x3ff);
td = x->td0 + i;
bp = x->bp0 + e->maxpkt*i/e->pollms;
if (td->status & Active)
continue;
if (e->mode == OWRITE){
if (td == x->etd) {
XPRINT("*");
memset(bp+e->off, 0, e->maxpkt-e->off);
if (e->off == 0)
td->flags |= IsoClean;
else
e->buffered += (((td->dev>>21) +1) & 0x3ff) - e->off;
x->etd = nil;
}else if ((td->flags & IsoClean) == 0){
XPRINT("-");
memset(bp, 0, e->maxpkt);
td->flags |= IsoClean;
}
} else {
/* Unread bytes are now lost */
e->buffered -= (td->status + 1) & 0x3ff;
}
td->status = ErrLimit1 | Active | IsoSelect | IOC;
}
wakeup(&e->wr);
}
static void
interrupt(Ureg*, void *a)
{
QH *q;
Ctlr *ctlr;
Endpt *e;
Endptx *x;
int s, frnum;
Usbhost *uh;
uh = a;
ctlr = uh->ctlr;
s = IN(Status);
ctlr->frameptr = inl(ctlr->io+Flbaseadd);
ctlr->framenumber = IN(Frnum) & 0x3ff;
OUT(Status, s);
if ((s & 0x1f) == 0)
return;
ctlr->usbints++;
frnum = IN(Frnum) & 0x3ff;
if (s & 0x1a) {
XPRINT("cmd #%x sofmod #%x\n", IN(Cmd), inb(ctlr->io+SOFMod));
XPRINT("sc0 #%x sc1 #%x\n", IN(Portsc0), IN(Portsc1));
}
ilock(&ctlr->activends);
for(e = ctlr->activends.f; e != nil; e = e->activef) {
x = e->private;
if(!e->iso && x->epq != nil) {
XPRINT("cleanq(ctlr, x->epq, 0, 0)\n");
cleanq(ctlr, x->epq, 0, 0);
}
if(e->iso) {
XPRINT("cleaniso(e)\n");
cleaniso(e, frnum);
}
}
iunlock(&ctlr->activends);
XPRINT("cleanq(ctlr, ctlr->ctlq, 0, 0)\n");
cleanq(ctlr, ctlr->ctlq, 0, 0);
XPRINT("cleanq(ctlr, ctlr->bulkq, 0, Vf)\n");
cleanq(ctlr, ctlr->bulkq, 0, Vf);
XPRINT("clean recvq\n");
for (q = ctlr->recvq->next; q; q = q->hlink) {
XPRINT("cleanq(ctlr, q, 0, Vf)\n");
cleanq(ctlr, q, 0, Vf);
}
}
static int
eptinput(void *arg)
{
Endpt *e;
e = arg;
return e->eof || e->err || qcanread(e->rq);
}
static int
isoreadyx(Endptx *x)
{
return x->etd == nil || (x->etd != x->xtd && (x->etd->status & Active) == 0);
}
static int
isoready(void *arg)
{
int ret;
Ctlr *ctlr;
Endpt *e;
Endptx *x;
e = arg;
ctlr = e->dev->uh->ctlr;
x = e->private;
ilock(&ctlr->activends);
ret = isoreadyx(x);
iunlock(&ctlr->activends);
return ret;
}
static long
isoio(Ctlr *ctlr, Endpt *e, void *a, long n, ulong offset, int w)
{
TD *td;
Endptx *x;
int i, frnum;
uchar *p, *q, *bp;
volatile int isolock;
x = e->private;
qlock(&e->rlock);
isolock = 0;
if(waserror()){
if (isolock){
isolock = 0;
iunlock(&ctlr->activends);
}
qunlock(&e->rlock);
eptcancel(ctlr, e);
nexterror();
}
p = a;
if (offset != 0 && offset != e->foffset){
iprint("offset %lud, foffset %lud\n", offset, e->foffset);
/* Seek to a specific position */
frnum = (IN(Frnum) + 8) & 0x3ff;
td = x->td0 +frnum;
if (offset < td->offset)
error("ancient history");
while (offset > e->toffset){
tsleep(&e->wr, return0, 0, 500);
}
while (offset >= td->offset + ((w?(td->dev >> 21):td->status) + 1) & 0x7ff){
td = td->next;
if (td == x->xtd)
iprint("trouble\n");
}
ilock(&ctlr->activends);
isolock = 1;
e->off = td->offset - offset;
if (e->off >= e->maxpkt){
iprint("I can't program: %d\n", e->off);
e->off = 0;
}
x->etd = td;
e->foffset = offset;
}
do {
if (isolock == 0){
ilock(&ctlr->activends);
isolock = 1;
}
td = x->etd;
if (td == nil || e->off == 0){
if (td == nil){
XPRINT("0");
if (w){
frnum = (IN(Frnum) + 1) & 0x3ff;
td = x->td0 + frnum;
while(td->status & Active)
td = td->next;
}else{
frnum = (IN(Frnum) - 4) & 0x3ff;
td = x->td0 + frnum;
while(td->next != x->xtd)
td = td->next;
}
x->etd = td;
e->off = 0;
}else{
/* New td, make sure it's ready */
while (isoreadyx(x) == 0){
isolock = 0;
iunlock(&ctlr->activends);
sleep(&e->wr, isoready, e);
ilock(&ctlr->activends);
isolock = 1;
}
if (x->etd == nil){
XPRINT("!");
continue;
}
}
if (w)
e->psize = ((td->dev >> 21) + 1) & 0x7ff;
else
e->psize = (x->etd->status + 1) & 0x7ff;
if(e->psize > e->maxpkt)
panic("packet size > maximum");
}
if((i = n) >= e->psize)
i = e->psize;
if (w)
e->buffered += i;
else{
e->buffered -= i;
if (e->buffered < 0)
e->buffered = 0;
}
isolock = 0;
iunlock(&ctlr->activends);
td->flags &= ~IsoClean;
bp = x->bp0 + (td - x->td0) * e->maxpkt / e->pollms;
q = bp + e->off;
if (w){
memmove(q, p, i);
}else{
memmove(p, q, i);
}
p += i;
n -= i;
e->off += i;
e->psize -= i;
if (e->psize){
if (n != 0)
panic("usb iso: can't happen");
break;
}
if(w)
td->offset = offset + (p-(uchar*)a) - (((td->dev >> 21) + 1) & 0x7ff);
td->status = ErrLimit3 | Active | IsoSelect | IOC;
x->etd = td->next;
e->off = 0;
} while(n > 0);
n = p-(uchar*)a;
e->foffset += n;
poperror();
if (isolock)
iunlock(&ctlr->activends);
qunlock(&e->rlock);
return n;
}
static long
read(Usbhost *uh, Endpt *e, void *a, long n, vlong offset)
{
long l, i;
Block *b;
Ctlr *ctlr;
uchar *p;
ctlr = uh->ctlr;
if(e->iso)
return isoio(ctlr, e, a, n, (ulong)offset, 0);
XPRINT("qlock(%p)\n", &e->rlock);
qlock(&e->rlock);
XPRINT("got qlock(%p)\n", &e->rlock);
if(waserror()){
qunlock(&e->rlock);
eptcancel(ctlr, e);
nexterror();
}
p = a;
do {
if(e->eof) {
XPRINT("e->eof\n");
break;
}
if(e->err)
error(e->err);
qrcv(ctlr, e);
if(!e->iso)
e->data01 ^= 1;
sleep(&e->rr, eptinput, e);
if(e->err)
error(e->err);
b = qget(e->rq); /* TO DO */
if(b == nil) {
XPRINT("b == nil\n");
break;
}
if(waserror()){
freeb(b);
nexterror();
}
l = BLEN(b);
if((i = l) > n)
i = n;
if(i > 0){
memmove(p, b->rp, i);
p += i;
}
poperror();
freeb(b);
n -= i;
if (l != e->maxpkt)
break;
} while (n > 0);
poperror();
qunlock(&e->rlock);
return p-(uchar*)a;
}
static int
qisempty(void *arg)
{
return ((QH*)arg)->entries & Terminate;
}
static long
write(Usbhost *uh, Endpt *e, void *a, long n, vlong offset, int tok)
{
int i, j;
QH *qh;
Block *b;
Ctlr *ctlr;
uchar *p;
ctlr = uh->ctlr;
if(e->iso)
return isoio(ctlr, e, a, n, (ulong)offset, 1);
p = a;
qlock(&e->wlock);
if(waserror()){
qunlock(&e->wlock);
eptcancel(ctlr, e);
nexterror();
}
do {
if(e->err)
error(e->err);
if((i = n) >= e->maxpkt)
i = e->maxpkt;
b = allocb(i);
if(waserror()){
freeb(b);
nexterror();
}
XPRINT("out [%d]", i);
for (j = 0; j < i; j++) XPRINT(" %.2x", p[j]);
XPRINT("\n");
memmove(b->wp, p, i);
b->wp += i;
p += i;
n -= i;
poperror();
qh = qxmit(ctlr, e, b, tok);
tok = TokOUT;
e->data01 ^= 1;
if(e->ntd >= e->nbuf) {
XPRINT("qh %s: q=%p first=%p last=%p entries=%.8lux\n",
"writeusb sleep", qh, qh->first, qh->last, qh->entries);
XPRINT("write: sleep %lux\n", &e->wr);
sleep(&e->wr, qisempty, qh);
XPRINT("write: awake\n");
}
} while(n > 0);
poperror();
qunlock(&e->wlock);
return p-(uchar*)a;
}
static void
init(Usbhost* uh)
{
Ctlr *ctlr;
ctlr = uh->ctlr;
ilock(ctlr);
outl(ctlr->io+Flbaseadd, PCIWADDR(ctlr->frames));
OUT(Frnum, 0);
OUT(Usbintr, 0xF); /* enable all interrupts */
XPRINT("cmd 0x%x sofmod 0x%x\n", IN(Cmd), inb(ctlr->io+SOFMod));
XPRINT("sc0 0x%x sc1 0x%x\n", IN(Portsc0), IN(Portsc1));
if((IN(Cmd)&1)==0)
OUT(Cmd, 1); /* run */
// pprint("at: c=%x s=%x c0=%x\n", IN(Cmd), IN(Status), IN(Portsc0));
iunlock(ctlr);
}
static void
scanpci(void)
{
int io;
Ctlr *ctlr;
Pcidev *p;
static int already = 0;
if(already)
return;
already = 1;
p = nil;
while(p = pcimatch(p, 0, 0)) {
/*
* Find UHCI controllers. Class = 12 (serial controller),
* Sub-class = 3 (USB) and Programming Interface = 0.
*/
if(p->ccrb != 0x0C || p->ccru != 0x03 || p->ccrp != 0x00)
continue;
io = p->mem[4].bar & ~0x0F;
if(io == 0) {
print("usbuhci: failed to map registers\n");
continue;
}
if(ioalloc(io, p->mem[4].size, 0, "usbuhci") < 0){
print("usbuhci: port %d in use\n", io);
continue;
}
if(p->intl == 0xFF || p->intl == 0) {
print("usbuhci: no irq assigned for port %d\n", io);
continue;
}
XPRINT("usbuhci: %x/%x port 0x%ux size 0x%x irq %d\n",
p->vid, p->did, io, p->mem[4].size, p->intl);
ctlr = malloc(sizeof(Ctlr));
ctlr->pcidev = p;
ctlr->io = io;
if(ctlrhead != nil)
ctlrtail->next = ctlr;
else
ctlrhead = ctlr;
ctlrtail = ctlr;
}
}
static int
reset(Usbhost *uh)
{
int i;
TD *t;
ulong io;
Ctlr *ctlr;
Pcidev *p;
scanpci();
/*
* Any adapter matches if no uh->port is supplied,
* otherwise the ports must match.
*/
for(ctlr = ctlrhead; ctlr != nil; ctlr = ctlr->next){
if(ctlr->active)
continue;
if(uh->port == 0 || uh->port == ctlr->io){
ctlr->active = 1;
break;
}
}
if(ctlr == nil)
return -1;
io = ctlr->io;
p = ctlr->pcidev;
uh->ctlr = ctlr;
uh->port = io;
uh->irq = p->intl;
uh->tbdf = p->tbdf;
XPRINT("usbcmd\t0x%.4x\nusbsts\t0x%.4x\nusbintr\t0x%.4x\nfrnum\t0x%.2x\n",
IN(Cmd), IN(Status), IN(Usbintr), inb(io+Frnum));
XPRINT("frbaseadd\t0x%.4x\nsofmod\t0x%x\nportsc1\t0x%.4x\nportsc2\t0x%.4x\n",
IN(Flbaseadd), inb(io+SOFMod), IN(Portsc0), IN(Portsc1));
OUT(Cmd, 0); /* stop */
while((IN(Status) & (1<<5)) == 0) /* wait for halt */
;
OUT(Status, 0xFF); /* clear pending interrupts */
pcicfgw16(p, 0xc0, 0x2000); /* legacy support register: turn off lunacy mode */
if(0){
i = inb(io+SOFMod);
OUT(Cmd, 4); /* global reset */
delay(15);
OUT(Cmd, 0); /* end reset */
delay(4);
outb(io+SOFMod, i);
}
ctlr->tdpool = xspanalloc(128*sizeof(TD), 16, 0);
for(i=128; --i>=0;){
ctlr->tdpool[i].next = ctlr->freetd;
ctlr->freetd = &ctlr->tdpool[i];
}
ctlr->qhpool = xspanalloc(64*sizeof(QH), 16, 0);
for(i=64; --i>=0;){
ctlr->qhpool[i].next = ctlr->freeqh;
ctlr->freeqh = &ctlr->qhpool[i];
}
/*
* the last entries of the periodic (interrupt & isochronous) scheduling TD entries
* points to the control queue and the bandwidth sop for bulk traffic.
* this is looped following the instructions in PIIX4 errata 29773804.pdf:
* a QH links to a looped but inactive TD as its sole entry,
* with its head entry leading on to the bulk traffic, the last QH of which
* links back to the empty QH.
*/
ctlr->ctlq = allocqh(ctlr);
ctlr->bwsop = allocqh(ctlr);
ctlr->bulkq = allocqh(ctlr);
ctlr->recvq = allocqh(ctlr);
t = alloctd(ctlr); /* inactive TD, looped */
t->link = PCIWADDR(t);
ctlr->bwsop->entries = PCIWADDR(t);
ctlr->ctlq->head = PCIWADDR(ctlr->bulkq) | IsQH;
ctlr->bulkq->head = PCIWADDR(ctlr->recvq) | IsQH;
ctlr->recvq->head = PCIWADDR(ctlr->bwsop) | IsQH;
if (1) /* don't use loop back */
ctlr->bwsop->head = Terminate;
else /* set up loop back */
ctlr->bwsop->head = PCIWADDR(ctlr->bwsop) | IsQH;
ctlr->frames = xspanalloc(FRAMESIZE, FRAMESIZE, 0);
ctlr->frameld = xallocz(FRAMESIZE, 1);
for (i = 0; i < NFRAME; i++)
ctlr->frames[i] = PCIWADDR(ctlr->ctlq) | IsQH;
/*
* Linkage to the generic USB driver.
*/
uh->init = init;
uh->interrupt = interrupt;
uh->portinfo = portinfo;
uh->portreset = portreset;
uh->portenable = portenable;
uh->epalloc = epalloc;
uh->epfree = epfree;
uh->epopen = epopen;
uh->epclose = epclose;
uh->epmode = epmode;
uh->read = read;
uh->write = write;
return 0;
}
void
usbuhcilink(void)
{
addusbtype("uhci", reset);
}